Malicious PDF — malware analysis report

Static analysis result for SHA-256 f05b4538dcafeeb9…

MALICIOUS

PDF

65.4 KB Created: 2021-02-16 21:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a3e3c0d6a4e5194b2b744d1bb1b0695d SHA-1: 8a4b26c2b8dd9f0787b9bbc78bc5e1abc2a41d1f SHA-256: f05b4538dcafeeb94614936f47d627e938d2dc57284f971a635bfce7fcb2b180
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://druttle.ru/wix?keyword=congruent+line+segments+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374177/normal_5ff773073fe3e.pdfIn PDF document text
    • http://glossywp.online/dead_effect_1_apk_data3s7vs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448345/normal_5fdb32f346bd2.pdfIn PDF document text
    • https://cdn.sqhk.co/tisufupujeli/jf9giLb/doramodolabegifitaxak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413457/normal_5fec9b1c58758.pdfIn PDF document text
    • http://ejinaya.com/find_my_friends_not_available_on_iphone_sevkb5q.pdfIn PDF document text
    • http://pitushok.fun/985493258276u14n.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/h0iahfz/minecraft_exploration_mod_apk_v1._16._1._02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zupenafud/78282989426.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/chrome_ing_proxy_script_slow.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/79116662967.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC717 4948 bytes
SHA-256: 06e9126baf2696b007d1810a95ecd491a2f2bef09d69cb6abb8a7c8fa730233c
font_01_sfnt_off0000d7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D4 9828 bytes
SHA-256: 12f2c18c1c4c379713adb638839818ec9b9288540cdad8a7eb0722c8205c6e8b